John pool



(Mode li) -J. POOL. SHUTTER- WORKER. No. 297,713, Patented Apr. 29,1884.

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WITNESSES INVESTOR "PATENT OFFICE.

UNITED STATES JOHN POOL, OF ELIZABETH CITY, NORTH CAROLINA.

SHUTTER-WORKER.

SPECIFICATION forming part of Letters Patent No. 297,713, dated April29, 1884-. Application filed July 3,1880. Renewed October 5, 1883.(ModeL) To all whom it may concern:

Be it known that I, JOHN POOL, of Elizabeth City, in the county ofPasquotank and State of North Carolina, have invented a new and usefullmprovementin Window-ShutterWorkers, which improvement is fully setforth in the following specification, reference being had to theaccompanying drawings, in which Figure 1 is a-view of thejointed lever.Figs.

IO 2 and 3 details, and Fig. 4 a perspective view of theframe andshutter with my improvement applied.

The object of my improvement is .to furnish a continuous series offulcrum-point bearings .15 to a movingjointed lever in opening orclosing a shutter, by the combination ofthcjointed lever a b c with thefixed fulcrum-plate A in' the form of a section of an ellipse, andfilling the angle between the window-frame and said jointed lever, thusaffording a continuous fulcrunrsurface bearing to the jointed leverduring the opening or closing of the shutter.

My improvement, in combination with the other parts in a window-shutterworker, will 25. be readily understood by reference to the drawings, inwhicha b, c is a jointed lever; A, a fixed fulcrumplate, being in theform of a section of an ellipse; B, a brace or support to jointed lever,while Fig. 4 isthe section of a window frame andshutter, showing therelative positions of all the parts and the manner in which my imopenedor closed. The handle-section of the lever falls down out of the waywhen the shutter is closed. The blind is opened by simply pushing outthe lever, and closed by pulling it 1n.

I am fully aware of the improvements by Robinson, No. 221,613, November11, 1879;

Hart, No. 175,604, April in shutter-workers.

What I claim as myimprovement is- In a shutter-worker, the combinationof the jointed lever a b c with the fixed curved fulcrum-plate A in theform of a section of an 4, 1876, and others ellipse, and filling theangle between the win (low-frame and saidjointed lever,-whereby saidjointed lever is afforded a continuous fulcrumsurface during the openingor closing of the shutter, substantially as described.

' JOHN POOL. Witnesses:

W. G. F0121),

JOHN PooL, Jr.

